public void TestGetLastModified()
{
// Arrange
AzureBlobFileSystem provider = this.CreateAzureBlobFileSystem();
provider.AddFile("1010/media.jpg", Stream.Null);
// Act
DateTimeOffset original = provider.GetLastModified("1010/media.jpg");
// Assert
Assert.AreNotEqual(original, DateTimeOffset.MinValue);
Thread.Sleep(TimeSpan.FromSeconds(1.1));
// Act
provider.AddFile("1010/media.jpg", Stream.Null);
DateTimeOffset updated = provider.GetLastModified("1010/media.jpg");
// Assert
Assert.AreNotEqual(original, updated);
}